No option to backup client PC in WHS 2011 from dashboard

[413x]

Still setting all this up

I have one PC connected with full read/write/dashboard access.

However ther is no option in the 'computers and backup' tab for the PC in question.
Only the server backup is there

How do i add the client PC to the list

 

[unleashed]

When you joined the client did you select the option to wake the up the client for automatic backup?